(seventies)
Frequency: The word is one of the 700 most common words in English.
1.
Seventy is the number 70.
Seventy people were killed.
NUM
2.
When you talk about the seventies, you are referring to numbers between 70 and 79. For example, if you are in your seventies, you are aged between 70 and 79. If the temperature is in the seventies, it is between 70 and 79.
It’s a long way to go for two people in their seventies.
N-PLURAL
3.
The seventies is the decade between 1970 and 1979.
In the late Seventies, things had to be new, modern, revolutionary.
N-PLURAL: the N